Guard sos heaters



E. N. BROWN AND M. H. SHOENBERG.

GUARD FOR HEATERS.

APPLICATION HLED 0cT.1. 1919.

1 1,368,108, I Patented Feb. 8, 1921.

Inventor 5/ 1 a M Atty? Uiiili SA'FEF? EDMUND n. BROWN AND MrL'ron n. snonnnnne, or sanrnancrsco, canironivra.

errant) non rina'rnns.

' To all wlaomc't may concern:

' the heated portion of an electric heater, as

for example from the heated element which in practice is usually sufflciently hot to cause inflammable objects coming in contact therewith to take flre.

The form and method of attaching the said guard wires and parts of the heater form the basis of our invention. Heretofore it has been customary to attach guard wires by grooves, hinges, or welding, or in some other well known manner, and to the heat reflecting surface; whereas, in our present invention we assemble the wires forming the cage on a spring ring which normally is expanded in the form of a circle. By springing together the two sides 7 of the ring the circle diameter is reduced indicated as by 1, 6, 'Z,

sembledin a frame of substantially circular and said rin is then sli ed'under a flan 'e or circular tongue, preferably formed with the reflector, or the protector flange extending beyond the reflector. The spring action of the ring when released holds the protecting cage in place.

T Referring to the drawings:

Figure 1 is a front view of the assembled cage with the retaining flange of the heater shown in dotted lines.

Fig. 2 is a side view of the cage with the reflectorand its protecting flange, and a retainingtongue or groove, shown in dotted lines. a l r r Fig. 3 is an assembled perspective view of an electric heater with our guard wire cage in assembled position.

Throughout the figures like numerals refer to similar parts. g

The wires of the guard frame or cage are and these are assection as indicated at 2. The frame and its wires are assembled with the heater,

preferablyagainst the flange 3, and within the annular recess 4 formed by the overhanging flange 5. The frame 2 is made Specification of Letters Patent.

EPatentedFeh. 8, 1921.

Application filed October 1, 1919. Serial I'Io. 327,762.

preferably of spring material such that by pressing together the wires 6, 7, in the direction of the arrows in Fig. 1, the space between the ends of the frame or gap in the frame structure, as shown at 8, is closed, thereby reducing the periphery and conscquently the diameter of the frame 2, so that it will pass within the recess or space 4. Upon releasing the pressure against the wires 6 and 7, the frame springs outwardly into the space 4: and is then engaged in retained position under the flange or tongue 5. The guard on the heater then having the appearance as indicated in Fig. 3, the heat generating element 12 is protected within the reflector 9 on the one side and the cage as 1, 6 and 7 on the opposite side. We prefer to assemble the wires as 1, 6 and 7 where they converge as by the ring 10 and.

plate 11, this gives rigidity to the structure so as to better maintain the spring relationship of the parts and also gives a neat finish to the assembled structure.

We claim: 7

1. In a heater a heat element constructed and adapted to radiate heat and mounted substantially at the focus of a concave heat reflector, and a reflector and an annular flange disposed at the periphery of the reflector and having an annular recess adapted to engage a ring, in combination with a ring to which are fixed a plurality of guard wires, said ringhaving a cut in its periphery to allow of distortion and said ring engageable with said recess.

2. In combination with an electric heater, a guard frame consistingof a center member to which are attached a plurality of radiating guard wires, said guard wires attached at their outer extremities to a ring, said ring parted at its periphery for the purpose of permitting lateral displacement whereby it may be engaged within a flanged recess, and a heat radiating reflector having a peripheral flange, said flange provided with said recess.

3. In combination with an electric heater, i

a guard frame consisting of a center member to which are attached a plurality of radiating guard wires, said guard wires attached at their outer extremities to a ring, said ring parted at its periphery for the purpose of permitting displacement whereby it may be engaged within a flanged recess, and a heat radiating reflector having a peripheral flange provided with said recess, said guard wires being formed substantially as on the surface of a sphere.

a. In combination with an electric heater, a guard frame consisting of a center to which are attached a plurality of radiating guard wires, said guard wires attached at their outer extremities to a ring, said ring parted at its peripher for the purpose of permitting lateral displacement whereby it may be engaged within a flanged recess, and a heat rac'liating reflector having a periplr eral flange formed with said recess, and a heat radiating element mounted between said 'uard wires and said reflector.

5. in combination with an electric heater, a guard frame consisting of a center memher to which are attached a plurality of radiating guard wi aid guard wires attached at their outer extremities to a ring, said ring parted at its periphery for the purpose of permitting lateral displacement whereby it may be engaged within a flanged recess, a heat radiating reflector having a peripheral flange with said recess, said guard wires being formed substantially as on the surface of a sphere, and a heat radiating element mounted between said guard wires and said reflector.

In testimony whereof, we have hereunto set our hands at San Francisco, California, this 22nd day of September, 1919.

EDMUND N. BROW'N. MILTON H. SHOENBERG. 

